No worries replacing the factory stereo in my V70 wagon. The original was a double-DIN unit, which slid right out. I replaced it with a single-DIN Blaupunkt head, and dropped the empeg sled in the top half. Did have to do a little Dremel work on the plastic sleeve in order to have something for the sled tabs to grab in, but that's about it.

Yeah, yeah, I know, "empeg is all you need," but I can't seem to get traffic and snow reports delivered in advance, yet.